MSRC compact vulnerability detail

CVE-2026-40405 · Windows TCP/IP Denial of Service Vulnerability

Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

Severity
Important
Impact
Denial of Service
CVSS
7.5 base · 6.5 temporal
Release
2026-05-12
Signals
Windows TCP/IP Denial of Service Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
Patch Diff
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Resolved binary override
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Description
Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.
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